Dorado,while closely related are not brycons so I'm not sure how the information in that link helps here.If you look at the two different species enough you should soon be able to tell them apart.Anyhow,I've had this species of brycon before and they seemed to get more aggressive as they got comfortable in the tank so they behave pretty similar to Salminus that I have had in the past.The shops here always seemed to label them as some kind of barracuda rather than use the brycon name.